The source of the magma river is the end of this fiery cavern, and above the magma river, there are a large number of fire spirits floating.

Driven by instinct, these fire spirits continue to absorb the aura and energy released by the magma river.

Among them, here Ye Feng and the others encountered a fire spirit with a body size of more than three zhang, and its core was a foot in size according to Ye Feng's observation.

The energy contained in it may have reached the strength of the middle and late stages of the Yu Dan Realm.

For this king-level fire spirit, Ye Feng was extremely eager to see it.

According to Ye Feng's observations along the way, the final achievement of the fire spirits has a great relationship with the crystal that gave birth to them.

The larger the volume of the Blazing Crystal, the deeper the color, and the clearer, brighter and larger the light mark in the center, the higher the growth limit of the fire spirit bred by it.

And the blazing crystals excavated near the end of the blazing cave are all dark crystals the size of a basin, this extremely rich red color, making the blazing crystals like a red mirror, which can clearly reflect the surrounding light!

Ye Feng didn't have much interest in the other products of the Blazing Cave, so he wanted to leave after collecting a large pile of Blazing Crystals.

Ling Xuan saw that Haofeng in the distance was staring at the fire spirit and was fascinated, so he asked Ye Feng and the others to leave first, and he stayed here to take care of Haofeng, and casually used special means to fix the fire spirit for him.

On the other side, Wang Yue left a few people to collect the surrounding spiritual materials, and he returned to the upper level, preparing to spread the means of dealing with fire spirits.

At the same time, it also allows people to organize manpower to prepare for a large-scale mining of the blazing cavern!

Unknowingly, everyone who had been in the blazing cave for almost a whole day was very tired, and after making an appointment for the next meeting, they dispersed.

Ye Feng, who got up early the next day, immediately couldn't wait to find an open place and began to study the fire spirit.

The core of the fire spirit has the ability to condense the aura and energy of the fire attribute, for this, Ye Feng is the most interested, if this ability is integrated into the magic, it will definitely make the ordinary fire attribute magic have a earth-shaking improvement.

In order to study the core of the fire spirit, Ye Feng naturally had to create the fire spirit for his own research.

With hundreds of observations on the process of the birth of the fire spirit, Ye Feng tried almost all the sizes of fiery crystals, and created various sizes of fire spirit cores.

Under this huge observation data, Ye Feng has gained a lot!

After that, Ye Feng began to study the explosion principle of the fire spirit fireball, although Ye Feng had already mastered the casting technique of the fire explosion bomb before, but his skill of high-strength compression of the fireball had its own advantages with the simple explosion method formed by the natural operation of the fire spirit.

The power of this burst fireball may not be comparable to Ye Feng's flame bomb, but it is better because it is fast and energy-saving.

At the same time, the two are not in conflict with each other, and they can be combined to form a more powerful Burst Flame Bomb.

Immediately afterwards, Ye Feng borrowed the operation method of the fire spirit to increase the viscosity of the flame, so as to greatly increase the attachment ability of the flame and deepen the continuous damage ability of the fire attribute magic.

To be honest, only a pure operation method like the fire spirit can give Ye Feng a chance to study, if it is replaced by a complex method such as runes, formation patterns or spirit patterns, Ye Feng will not be able to integrate into his own magic system by studying the operation mode of his energy.

Ye Feng's research made him completely forget the existence of time, but when he reacted and was about to take out his pocket watch to check the time, his head was hit by a peach that he had bitten in.

When I looked back, I saw that Mingxin and his party were actually there!

"Why are you here?" Ye Feng picked up the peach that fell to the ground, rubbed it slightly, and gnawed it directly.

"Your question, it suddenly makes people want to hit someone!" Zhao Zifei said with a hateful face, these people have been waiting for Ye Feng for almost half an hour, and finally found a guy here who doesn't listen to foreign affairs!

"Still, I'm hungry!" Ye Feng had no remorse at all, and gnawed the peaches in his hand in three or two times, and then asked Tang Yu for it.

I didn't even eat early in the morning, so I ran here to study, and now that I come to my senses, my stomach is almost hungry.

"You're hungrier than I am!" Seeing that Ye Feng actually picked up the peaches on the ground, he gnawed them up, and threw them over painfully!

Seeing Tang Yu holding a large pile of peaches in his arms, but only giving himself one, he couldn't help but roll his eyes.

While nibbling on the peach, Ye Feng contributed everything he had just researched, "This is the aura operation method I just researched, listen to it and see if it is useful......

What Ye Feng said, for most people, naturally did not know what to say, but for a few people who were proficient in spells, they heard the meaning.

"A fire spirit can actually allow you to study so many secret methods, why do you always fight people!" Zhao Zifei is a fire-attribute monk, and he also has the talent to cast spells, so Ye Feng can completely master these secret methods.

It's just that if you want to improve the spell, I'm afraid it will take a while to run.

Because of this, she knew the gap between herself and Ye Feng.

"No, I haven't said anything better?" Ye Feng said helplessly.

After speaking, he saw Ye Feng's hands folded in front of him, and then his eyes were closed, obviously putting all his heart into it.

And at this time, everyone saw a cloud of aura gathered in Ye Feng's hands under the control of Ye Feng.

Immediately afterwards, at the core of the aura mass, extremely subtle wisps of aura began to converge and intertwine.

Under this subtle and imperceptible interweaving, the originally illusory aura actually transformed, forming a unique aura, slightly flickering with a beating red light.

The next moment, the aura mass in Ye Feng's hand began to shrink, and then it formed a fire spirit core and appeared in front of everyone.

"Fire Spirit...... Core? Zhao Zifei said with a puzzled face, Ye Feng didn't use the power of the Blazing Crystal just now, he completely completed this step by his own means!

It's just that this fire spirit core is also a little different from normal, for example, its form is obviously a little unstable, not as round as a normal fire spirit, but has some strange protrusions.

"Sort of, but it doesn't seem to have worked out." Ye Feng nodded, he was sure that he had just used his subtle control of the aura to simulate the process of merging the aura with the blazing crystal.

It's just that this process seems to be smooth, but for some reason, it seems that there is a lack of a bit of mysterious spiritual charm, which makes the core of this fire spirit unable to last for a long time.

Once the core of the artificial fire spirit is activated to the extreme, it will collapse itself, and compared to the fire spirit that can survive for an unknown number of years in the Blazing Cave, this short-lived fire spirit is really impossible to climb.

However, if you take into account the needs of the battle, this time is enough!

Seeing the incarnation of Ye Feng, an artificial fire spirit, Tang Yu immediately ran to the bottom of a big tree next to him, and quickly broke a branch, wanting to feed this artificial fire spirit to see if it would grow up like a fire spirit.

After knowing Tang Yu's thoughts, Fenghua did not lag behind, and hurriedly broke a few branches back and handed them to Tang Yu.

Seeing them gesturing around this artificial fire spirit, Ye Feng could only control it, ignite the branches, and then absorb the energy released.

The way the fire spirits survive is destined for their lives, and they must spend their lives in the process of constantly plundering energy. Otherwise, once their energy is unsustainable, the fire spirits that can't stop releasing their own energy will fall into a state of rapid decline.

At that time, if there is no more aura and energy replenishment, it is the time for them to die.

Such a creature, if it is used under normal circumstances, will naturally not be of much use, but will attack the surrounding personnel at the first time because of its uncontrolled characteristics.

However, if the fire spirit is placed on the opposite side of the evil soldier, then such a fire spirit is undoubtedly a powerful weapon.

I'm not afraid of death, it's hard to die, plus the destructive power is amazing and can't be transformed, etc., in the face of evil soldiers, it's completely a good existence!

The only problem now is how to make good use of the Blazing Crystal, and this requires the assistance of the formation!

Thinking of this, Ye Feng couldn't help but look at Zhao Zifei, an orthodox array mage.

She is not a halfway monk like Ye Feng, and she is not completely out of the house!